Adds a spawn mixtape admin verb #8258

Job	Run time
Collect data for other tasks	10s
Lint with OpenDream	29s
Run Linters	2m 22s
Compile Maps	2m 11s
Windows Build	1m 54s
Integration Tests (boxstation) / run_integration_tests	13m 14s
Integration Tests (deltastation) / run_integration_tests	17m 50s
Integration Tests (kilostation) / run_integration_tests	12m 39s
Integration Tests (metastation) / run_integration_tests	13m 15s
Integration Tests (northstar) / run_integration_tests	13m 29s
Integration Tests (tramstation) / run_integration_tests	13m 10s
Integration Tests (icebox) / run_integration_tests	14m 0s
Integration Tests (multiz_debug) / run_integration_tests	12m 27s
Alternate Tests (515, 1627, runtimestation) / run_integration_tests	10m 32s
Integration Tests (runtimestation) / run_integration_tests	10m 38s
Check Alternate Tests	1s
Compare Screenshot Tests	37s
	2h 18m 58s

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